Doweling machine



Jun; 15 192$ J.BURGER DOWELING MACHINE Filed July 10. 1923 5Sheets-Sheet 1 7 INVENTOR June 15 1926.

J. BURGER DOWELING MACHINE Filed July 10. 1923 s Sheets-Sheet 2.IIIIIIIEM June 15 1926. 1,588,443

. J, BURGER DOWELING MACHINE Filed July 10. 1923 3 Sheets-Sheet 8Patented June 15, 1926 UNITED STATES.

V JOSEPH BURGER, OF BIC HMONDIHILL, NEW YORK.

DOWELING MACHINE.

Application nled m io, 1923. Seria1:No. 650,599.

5 practically automatic in its operation and will be readily adaptableto meet difierent conditions and requirements.

In the accompanying drawings there is illustrated an embodiment of theinvention wherein the foregoing and other objects are attained but asthis illustration is primarily j,

for purposes of disclosure, it will be under stood that; the structuremay be modified without departure from the true spirit and scope of theinvention ashereinafter defined and claimed.

Figure 1 is a side elevation and part sect tional view of the machine.

Figure 2 is a broken front elevation of the same.

Figure 3 is a horizontal sectional view on substantially the plane ofline 33 of Figure 1, showing particularly the adjustable work rest orsupport.

Figure 4 is a vertical sectional view on substantially the plane of lineH of Fig ure 1 of the adjustable eccentric for imparting avariablestroke to the driving head.

Figure 5 is an enlarged broken vertical sectional view as onsubstantially the plane of line 55 of Figure 2.

Figure 6 is a fragmentary horizontal. sectional view of the hold-downclutch mecha-- nism as on substantially the plane of line 66 of Figure5. i

I The machine in the present disclosure is designed for use in themanufacture of wood heels and the various parts of the machine aretherefore constructed with this end in view. 5 c i Thus'the work holderor support is in the form of a table 7 of a size to support a wood heelSand pivoted at 9 .so that it maybe tilted to accommodatethestyle of theheel. The tilting adjustment is effected by means of a screw 10 whichserves to shift a post 11 slidably mounted in a guide-way 12 below thework table, said post having a supporting engagement with the under sideof the.

table, as indicated in Figures 1 and 5.

'The work is positioned upon the table by means of a gage 13 shown inFigure 5 as slidably guided in a slot 14 in the table and adjustablypositioned therein by the screw The adjustable work support may also bebodily raised and lowered in .theillustration bymeans of a screw 16,operating in a screw seat 17 in a part of the frame of the machine andengaging the vertically adjustable bed 18 of the work support which canslide in vertical guide-ways .19. A look nut 20 on the adjusting screw16 serves to secure the bed carrying the work support in its verticallyadjusted relation.

, The dowel driving mechanism includes in the present disclosure averticallyreciproeating head 21 carrying a one-way driving clutch havinga guide passage 22 for the dowel rod 23 with radially disposed dogs 24:pivoted at the lower end of the same at 25. These dogs have outwardlyextended arms acted on by springs 26 which rock the dogs in a directionto thrust the points at the lower ends of the same inwardly intoengagement with the dowel rod.

The driving head is shown as carried by slide rods 27 operating invertical guides 23 and connected together at their lower ends by a crossbar 29 to which there is'pivoted at 30 an eccentric rod 31. The lowerend of the rod 31 is shown as provided with an eccentric strap 32engaged about an eccentric 33 on the drive shaft 34.

. A. special feature of the eccentric is that it is mounted adjustablyupon its shaft for the purpose of varying the stroke imparted to thedrive head. This adjustable mounting is effected in the illustration byforming the eccentric with a slot 35 extending inward from near one edgethereof so, that it may be adjusted radially of the shaft and by securin'it to the face of a disc 36 fast on the s aft by bolts 37 extendingthrough slots 38 in thedisc, parallel to the slot in the eccentric. Asan aid to adjustment the eccentric is shown as carrying a set screw 39at the side of the same, extending radially inward into'engage'ment withthe adjacent edge of the'disc'36.

With the construction described it is possible to vary the throw of theeccentric and hence the stroke of the drive clutch by simply looseningthe securing screws 37, adjusting the set screw39 and then tighteningthe screws 37 after the eccentric has been shifted to its new radialposition upon the lowing the drive clutch during its return stroke,there is provided in the illustration a one-way acting hold-down clutchconsisting of a pair of spur wheels 40 adapted to grip the dowel rodbetween them and pro-. vided with ratchets 41 engaged by spring pawls 42and faced to permit rotation of the spur wheels with the downward feedof the dowel rod and to prevent rotation of said wheels in the reversedirectionQ These spur wheels, by gripping the dowel rod, serve to guidethe same and also operate as an effective oneway clutch to hold thedowel as fast as it is advanced and prevent it from following the driveclutch upon the retrac tive movement of the latter.-

To provide for a certain amount of adjustment of the rod gripping rolls,the latof tubing.

ter are shown as carried by blocked?) slidably engaged in a guide-way 4and one actedon by a set screw 1 5 and the other by a stud 16 projectingfrom a handle 17 which has at its outer end a lug 4&8 bearing on a camtrack 49. v The stud serves a swivel for the handle and it will beevident that when the handle is swung forwardly and downwardly to freethe lug 48 from the cam track 49, the cooperating pressure of the spurwheels on the dowel rod will be released or reduced so that the rod canbe shifted or removed from position therebetween. I

The rod is cut off at the proper dowel length in the machine disclosedby an automatic cutter comprising a knife 50 carried by a slide 51operating in a horizontal way 52 and cooperatingwith relatively fixedcutter edge 53. The cutter slide is shown as provided at its outer endwith an inclined cam slot 54 engaged by pin .55 on the upper end of theslide rod 56 which carries at its lower end a shoe 57 positioned to beengaged by an eccentrically disposed roll 58 on the drive shaft 34.

The cutter mechanism is preferably constructed to leave the dowel rodwith a some- What pointed end, asindicated, so thatthe same will readilyenter the hole provided for it in the heel or other article. In theillustration this pointing effect is obtained by constructing the cutterblades so that in completing'the'cut, the end of the rod will besqueezed or crushed into the semblance of a point.

Where the dowels are of wood'or similar material it is usually desirableto provide an adhesive forsecuring them in place; In the illustrationthis is effected by the provision of a cup 59 at the upperend of thepassage 22 in the driving head which receives glue or other adhesivefrom a tube 60 extending from a reservoir 61. The lower end of this tubeis shown as having a guard (52 partially surrounding the dowel rod andthe-flow of adhesive is controlled by a valve 63 interposed at asuitable point in the line The adhesive reservoir is shown as held in anadjustable clamp 6d carried by a bracket 65 attached to the drive head.reservoir therefore partakes of the up and down movement of the drivehead, which movement; has a tendency to facilitate the flowof adhesive.To make the adhesive flow more positive, there is indicated a piston 66within the reservoir carried by a rod 67 axed to the ceiling or otherstationary sup port. valve 68 which opens on'the down stroke of thereservoir and closes upon the up stroke of the reservoir so as to applypressure and force out a --cer tain quantityo-t ad hesive upon each upstroke ofthe head.

The operation of the machine illustrated is controlled by aone-revolution clutch indicated generally at 69'wliich is tripped into.action by a rod ?0 connected with a conveniently located pedal (notshown).

In using the machine the adjustable eccentric is set to produce-adriving stroke suilicient for the length of dowel which it is desired todrive and the work rest and gage are adjusted to supportthe work inproper position to take such a'dowel. It is then only necessary to placethe heel or other article upon the work rest and trip the "controlclutch, whereupon, with one The This piston is shownas having a flap toits uppermost position. "In this return movement a measured quantity ofthe :adhesive will be forced out into the cup surrounding the upperportion of the rod 'so that the subsequently driven dowels will: receivetheir proper measure of adhesive.

To insure proper stoppage of the parts at the end of a cycle ofoperations initiated by the press clutch an automatic brake, such asindicatedat 71, may be provided on the drive shaft.

' What I claim is 1. In a 'machineof the character disclosed, areciprocating head, a one-way rod engaging clutch carried by said head,an ad hesive reservoir carried by'said head and having a supply passageextending to the clutch and a work rest for positioning the work toreceive-a dowel rod advanced by the clutch. I

2. A combination as in claim 1 with means supported from a fixedpointan'd cooperating with the reciprocating'reservoir to apply pressureto the.adhesivethereint 3. A con'ibinationa's. in claim 1 in'whic'h thereservoir is adjustably mounted on the reciprocating head and a pistonwithin the reservoir is supported from a relatively the rod passes andpawl and ratchet mechanism for preventing retrograde movement of saidrolls, one of the rolls being carried by a block having an adjustablemounting and a cam lever releasably holding said block in place.

6. In a machine of the character disclosed, a reciprocating head, aoneway operative rod driving clutch carried by said head, a reverselyoperative one-way rod holding clutch in line with the rod drivingclutch,

' a support for positioning the work in line with the clutches andvariably adjustable to locate the work at different angles and differentdistances from the clutches and means for varying the eliective strokeof the drive clutch in accordance with the adjustments of the worksupport and means for automatically supplying adhesive to the rod heldin the driving clutch irrespective of the various adjustments of theseveral parts described.

7. In a machine of the character disclosed, a driving clutch having adowel rodpassage, means for automatically supplying adhesive to a dowelengaged in said passage and a work support in the line of the dowel rodadvanced by the clutch.

8. In a machine of thecharacter disclosed, a reciprocating head, aone-way rod driving clutch carried by said head, an adhesive reservoirhaving a supply passage extending to said clutch, means forautomatically forcing the adhesive under pressure through said supplypassage to the clutch and a rest for positioning the work to receive thedowel rod advanced by the clutch.

9. In a machine of the character disclosed, a one-way operativereciprocating dowel driving clutch, a bed adjustable longitudinally ofthe driving stroke of the clutch, a heel supporting table pivotallymounted on said bed, a member fortilting said table to vary the angle ofthe heel with respect to the dowel and a gage adjustable on said tiltingtable for positioning the heel laterally in respect to the dowel.

10. In a machine of the character disclosed, a reciprocating rod drivingclutch, a support for positioning the work in line with the rod advancedby the clutch, means for automatically supplying adhesive-to the rodheld by the clutch, spur wheels positioned to bite into the rod advancedby the clutch and pawl and ratchet mechanism for holding said spurwheels against retrograde movement to thereby positively hold the rod inthe advanced position. a

In witness whereof, I have hereunto set my hand this 26th day of June,1923.

JOSEPH BURGER.

